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Implantable telemetry system for long-term EMG. 植入式长期肌电遥测系统。
Biotelemetry Pub Date : 1977-01-01
M Marquès, B Dutourné
{"title":"Implantable telemetry system for long-term EMG.","authors":"M Marquès,&nbsp;B Dutourné","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Our aim was to record the uterine muscular activity of the badger or the fox. For long-term physiological experiments, commercial transmitters cannot be used. The operating time of commercial transmitters with a single set of batteries does not exceed 15 days at the most. In addition, the dimensions render implantation of such equipment impossible. It is not always necessary to record permanently but sometimes a few minutes a day are sufficient to assess the evolution of a phenomenon. We have conceived and constructed a miniature implantable receiver module which allows the transmitter to be switched on and off in order to be operated only during selected periods of time.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 1","pages":"28-33"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11768764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Precision calibration of patient care equipment as failure predictor. 作为故障预测器的病人护理设备的精确校准。
Biotelemetry Pub Date : 1977-01-01
W H Buchsbaum
{"title":"Precision calibration of patient care equipment as failure predictor.","authors":"W H Buchsbaum","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Reliability of patient care equipment could be enhanced if failures could be predicted and repairs made on a routine instead of emergency basis. The paper describes the efforts of the Biomedical Engineering Department at Brookdale Hospital Medical Center to use changes in accuracy of selected parameters as failure predictor. Monthly precision tests of ECG rate computers, strip chart recorders and waveform analysis of defibrillator discharges were used in this experiment. For defibrillators and strip chart records failures could clearly be predicted but the results for ECG rate computers are still inconclusive.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 1","pages":"18-27"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11799322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimum temperature requirements for cutaneous oxygen measuremtns (cpO2); a comparative study of 44 and 43 degrees C. 皮肤氧测量(cpO2)的最佳温度要求;44度和43度的比较研究。
Biotelemetry Pub Date : 1977-01-01
L Hohenauer, J W Gerstl
{"title":"Optimum temperature requirements for cutaneous oxygen measuremtns (cpO2); a comparative study of 44 and 43 degrees C.","authors":"L Hohenauer,&nbsp;J W Gerstl","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Simultaneous measurements of cutaneous pO2 with oxygen skin sensors heated to 44 and 43 degrees C have been performed in 9 newborns in respiratory distress. 25 simultaneous measurements of paO2, cpO2 (44 degrees C) and cpO2 (43 degrees C) and 150 h of simultaneous recordings at these two different temperatures were compared. The agreement with arterial pO2 values was found to be superior at the higher sensor temperature. At 43 degrees C, the cpO2 is much lower than at 44 degrees C and lower than the arterial values. Although the risk of thermally induced lesions during prolonged use is higher at 44 degrees C, it is advisable to use this temperature for monitoring critically ill infants. Burns can be avoided by frequently changing the measuring site.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 2","pages":"101-8"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11813360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Skin sensors for continuous oxygen monitoring of newborns. 用于新生儿连续氧监测的皮肤传感器。
Biotelemetry Pub Date : 1977-01-01
P Eberhard, W Mindt
{"title":"Skin sensors for continuous oxygen monitoring of newborns.","authors":"P Eberhard,&nbsp;W Mindt","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Since the introduction of the technique of cutaneous1 pO2 measurement by directly heated oxygen sensors in 1972, the clinical applications and limitations of this new method have been extensively investigated. The method has proven to be of particular value in monitoring of high risk newborns as it affords the possibility of continuously monitoring clinically significant changes in the oxygenation state of the newborn. In this paper, methodological criteria for the assessment of the reliability of cutaneous pO2 monitoring are discussed. Particular consideration is given to the oxygen and temperature profiles in the vicinity of the skin sensor and to the response time of the sensor. In view of the fact that the cutaneous pO2 reflects the oxygen partial pressure at the level of arterialized cutaneous tissue, the method has limitations if it is used as an indirect determinant of arterial pO2.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 2","pages":"48-76"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11813361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pulse width to analog converter for a portable radio telemetry receiver. 用于便携式无线电遥测接收机的脉宽模拟量转换器。
Biotelemetry Pub Date : 1977-01-01
P Reischl, U Reischl
{"title":"Pulse width to analog converter for a portable radio telemetry receiver.","authors":"P Reischl,&nbsp;U Reischl","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A pulse width tracking system is described which converts a pulse width modulated telemetry signal into an analog signal. The converter, which is based on an integrated circuit chip design, contains a feedback feature that makes it ideal for high stability servo applications. The converter was designed as an integral part of a long-range radiotelemetry system used in occupational health field research.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 1","pages":"9-17"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11799324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relation of transcutaneous to arterial pO2 in hypoxaemia, normoxaemia and hyperoxaemia. Investigations in adults with normal circulation and in patients with circulatory insufficiency. 低氧血症、常氧血症和高氧血症经皮与动脉pO2的关系。循环正常的成人和循环功能不全患者的调查。
Biotelemetry Pub Date : 1977-01-01
G Goeckenjan, K Strasser
{"title":"Relation of transcutaneous to arterial pO2 in hypoxaemia, normoxaemia and hyperoxaemia. Investigations in adults with normal circulation and in patients with circulatory insufficiency.","authors":"G Goeckenjan,&nbsp;K Strasser","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The transcutaneous oxygen tension was monitored continuously by a heated cutaneous polarographic electrode in 7 adult intensive care patients, 12 patients without circulatory insufficiency, and 5 healthy volunteers, Arterial pO2 values were varied from hypoxaemia to normoxaemia and hyperoxaemia by variations of the inspired oxygen concentration. In normal volunteers and in patients without circulatory failure, transcutaneous pO2 indicated on an average about 81-92% of the arterial pO2 in normoxaemia and hyperoxaemia with a correlation coefficient of 0.97. In hypoxaemia there was an over-proportional decrease of the transcutaneous pO2 to a mean value of 44% fo the arterial pO2. In one case the transcutaneous pO2 reproducibly dropped to zero at paO2 values of 41 respectively 38 mm Hg (5.5 respectively 5.1 kPa). In intensive care patients the transcutaneous pO2 values were considerably lower than the paO2 values. There was no constant transcutaneous to arterial pO2 ration in most of the intensive care patients at different pO2 levels. In adults without disturbance of peripheral perfusion paO2 can be predicted with satisfactory accuracy from transcutaneous pO2 values in normoxaemia and in hyperoxaemia. In hypoxaemia and in circulatory insufficiency, the transcutaneous pO2 is only an indicator of the trend of the arterial pO2. Under these conditions it does not allow a quantitative estimate of paO2 changes.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 2","pages":"77-87"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11813362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Circadian variations of blood pressure in patients with different degrees of hypertension. Changes induced by hypotensive treatment. 不同程度高血压患者血压的昼夜变化。降压治疗引起的改变。
Biotelemetry Pub Date : 1977-01-01
A C Pessina, P Palatini, P Trevi, P Benussi, P Veronese, M Hlede, C Dal Palú
{"title":"Circadian variations of blood pressure in patients with different degrees of hypertension. Changes induced by hypotensive treatment.","authors":"A C Pessina,&nbsp;P Palatini,&nbsp;P Trevi,&nbsp;P Benussi,&nbsp;P Veronese,&nbsp;M Hlede,&nbsp;C Dal Palú","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Arterial pressure was continuously recorded for 24--48 h in 3 normotensive subjects and in 60 hypertensive patients. The greatest variations occurred in those with labile, mild or moderate hypertension compared to those with severe hypertension or normal blood pressure. Atenolol (100-200 mg) administered once or twice daily produced a significant reduction of arterial pressure and a smaller response to the cold pressor test, hand grip and step test in patients with established hypertension, but little change in those with labile hypertension. The evening dose was not followed by a decrease in pressure greater than that observed without treatment, but determined a smaller rise on awaking.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 3","pages":"140-50"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11817462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fundamental aspects of antimony thin film electrodes for pH measurement. 用于pH测量的锑薄膜电极的基本方面。
Biotelemetry Pub Date : 1977-01-01
T Shigemitsu, G Matsumoto
{"title":"Fundamental aspects of antimony thin film electrodes for pH measurement.","authors":"T Shigemitsu,&nbsp;G Matsumoto","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This report concerns the investigation of the sensitivity, temperature dependence, accuracy, and the standard electrode potential EO of an antimony thin film pH electrode which was prepared with electron beam evaporation techniques. The air-formed oxide film on antimony thin film electrodes has been proved by both the cathodic reduction method and electron spectroscopy for chemical analysis (ESCA). The antimony thin film electrode responded rapidly to pH changes and its sensitivity was slightly changed depending on the buffer composition. The accuracy of this electrode was compared with that of the glass electrode. Temperature had some influence on the function of this electrode. The standard electrode potential of this electrode was discussed together with that of other forms of antimony electrodes. The structure and thickness of the surface oxide on antimony thin film electrodes was confirmed by cathodic reduction and ESCA. It was clear that the surface oxide governs the electrode reactions. Possible applications of the antimony thin film electrode are discussed stating some limitations in the use.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 3","pages":"151-64"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11250606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Transcutaneous pO2 of volunteers during hyperbaric oxygenation. 志愿者在高压氧合过程中的经皮pO2。
Biotelemetry Pub Date : 1977-01-01
A Huch, R Huch, G Hollmann, T Hockerts, H P Keller, D Seiler, J Sadzek, D W Lübbers
{"title":"Transcutaneous pO2 of volunteers during hyperbaric oxygenation.","authors":"A Huch,&nbsp;R Huch,&nbsp;G Hollmann,&nbsp;T Hockerts,&nbsp;H P Keller,&nbsp;D Seiler,&nbsp;J Sadzek,&nbsp;D W Lübbers","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Continuous transcutaneous pO2 measurements (tcPO2 measurements) were performed in healthy volunteers who were breathing air and oxygen under hyperbaric conditions (max. 4 ata). The results show a close correlation of PO2 values measured by the noninvasive method, in blood from discret arterial punctures, chamber PO2, respectively, the PO2 of the inspiratory gas mixture which was checked up to maximal values of 2,200 mm Hg. The PO2 in the arterial blood samples was measured immediately after the puncture insight the hyperbaric chamber using a specially designed through electrode.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 2","pages":"88-100"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11813363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The use of hybrid integrated circuit techniques in biotelemetry applications. 混合集成电路技术在生物遥测中的应用。
Biotelemetry Pub Date : 1977-01-01
T B Fryer
{"title":"The use of hybrid integrated circuit techniques in biotelemetry applications.","authors":"T B Fryer","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A review is presented of some features of hybrid integrated circuits that make their use advantageous in miniature biotelemetry applications. The various techniques for fabricating resistors, capacitors and interconnections by both thin film and thick film technology are discussed. The use of chip capacitors, resistors, and especially standard IC chips on substrates with fired-on interconnection patterns is emphasized. The review is designed primarily to acquaint biotelemetry users and designers with an overview of this fabrication technique so that they can better communicate their needs with an understanding of its limitations and advantages to facilities specializing in hybrid construction.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"4 4","pages":"193-216"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11818938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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